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Methyl methacrylate was polymerized at mass concentration of 200 gdm^-3 in toluene using azobisisobutyronitril as initiator at a mass concentration of 1.64*10^-2gdm-3 and a reaction temperature of 60 degrees C. Calculate the initial rate of polymerization and the molar mass of the poly (methyrl methacrylate) formed in the initial stages of the reaction given that the relevant rate cofficients at 60 degrees are: Initiator dissociation kd=8.5X10^-6 s-1 Propagation kp=833dm^3mol-1s-1 Termination, kt=9.3*10^6 dm^3 mol-1s-1 Transfer to monomer kum=3.93*10^-3dm^3mol-1s-1 Transfer to solvent kus=7.34*10^-3 dm^3 mol-1s-1 Assume that the initiator efficiency f=.7 that termination by combination is negligible and that the density of the initial solution of MMA in toluene is 860 gdm^-3
Carbonyl fluoride, , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
the phosphorylation of 2 moles of ADP to ATP and has a deltaG= -135 kJ/mol. What is the deltaG for the conversion of glucose into lactic acid?
A compound contains 69.94 percent iron and 30.06 percent oxygen. What is its molecular formula if the molar mass of the compound is 199.55 grams per mole?
In 1774, Joseph Priestley discovered that mercury(II) oxide decomposes on heating to elemental mercury and a gas, later called oxygen. If 56.0 g of mercury(II) oxide is heated and 26.0 % of it decomposes,
Calculate the pH of a solution containing 25.00 mL of 0.12 M formic acid (Ka = 1.7 x 10^-4) to which the following amounts of 0.10 M NaOH have been added:
53.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 189 mL of water.
A 0.50 sample of vegetable oil is placed in a calorimeter. When the sample is burned, 18.9 are given off. what is the caloric value of the oil
Determine ?H for the formation of one mole of aluminium(III) oxide, Al2O3(s) from the elements?
A 50.0 mL sample of vinegar (density = 1.06 g/mL) was diluted to 500.0 mL. Titration of a 50.0 mL aliquot of this solution required 42.5 mL of 0.0900 M NaOH to reach the end point. Determin the acid content of the vinegar as wt. % acetic acid.
One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 74°C. Weights are removed suddenly from the piston to give the following sequence of three pressures.
Write an equation for this reaction? which species acts as the nucleophile? Which species acts as the electrophile?
C6H5OH(s) + 7O2(g) --> 6CO2(g) + 3H2O(g) A 2.000 gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation above.
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